I am the same as you and love all the parks for different reasons but one park did stand out for me.
I loved Hollywood Studios, i think this was because it was my last night in Florida and my family and i all watched Fantasmic for the first time and i just remember feeling so happy to be there, but yet kind of sad because i was leaving the next day. So for now i will say Hollywood Studios, but on my next trip this may change
Epcot. It is so different from any of the other theme parks to me. It was also the very first park we visited on our first trip to Disney so I will always have that memory of soaking in the reality that we were really there and perhaps that is subconsciously associated with our love of this park.
There is so such a great range of places to eat and the World Showcase is just amazing. And let's not forget Illuminations - best show in the world for me. Interestingly enough, it is often branded the 'least suitable park for kids' yet my DD was 6 years old and fell in love with it.
EPCOT for me too! Love it, especially when the F & W Festival is on....just love strolling around the World with a nice cold drink (alcoholic of course....im on holiday )
Even love sitting outside the Rose & Crown with my hubby just people watching for hours with not a care in the world! Love doing this in Hollywood Studios too!
Got to add.....were not drunken louts though haha and dont make an exhibition of ourselves!!